natural filter media Articles

  • Influence of powdered Moringa oleifera seeds and natural filter media on the characteristics of tapioca starch wastewater

    Moringa oleifera tree is indigenous and highly abundant in Indonesia and its seeds are widely known to be used as a natural coagulant for treating wastewater. Wastewater from tapioca starch industry, particularly in Indonesia, which contains high organic matters, was revealed by high biochemical oxygen demand (BOD) and chemical oxygen demand (COD) value. In this study the combination of powdered ...

  • Treatment of heavy metals by iron oxide coated and natural gravel media in Sustainable urban Drainage Systems

    Sustainable urban Drainage Systems (SuDS) filter drains are simple, low-cost systems utilized as a first defence to treat road runoff by employing biogeochemical processes to reduce pollutants. However, the mechanisms involved in pollution attenuation are poorly understood. This work aims to develop a better understanding of these mechanisms to facilitate improved SuDS design. Since heavy metals ...


    By IWA Publishing

  • The natural way to clean wastewater

    John Todd founded Ocean Arks International in the 1980s, where he started to experiment with processes that mimic natural ways to purify wastewater. He built a greenhouse and ran sewage through a series of tanks, with plants suspended in the flowing waters, and constructed marshes made of sand and gravel. No chemicals were added, but plenty of aquatic creatures from snails to small fish were ...


    By BioCycle Magazine

  • Industrial Media Filtration Systems, Philippines

    INTRODUCTION In July 2013, Pure Aqua successfully manufactured industrial media filtration systems to a major company in Philippines to remove particulates, chlorine, organics, and odor from well water. The industrial media filtration systems were selected from our MF-1000 Series with 48" and 42" diameter ...


    By Pure Aqua, Inc.

  • Co-optimisation of phosphorus and nitrogen removal in stormwater biofilters: the role of filter media, vegetation and saturated zone

    Biofilters have been shown to effectively treat stormwater and achieve nutrient load reduction targets. However, effluent concentrations of nitrogen and phosphorus typically exceed environmental targets for receiving water protection. This study investigates the role of filter media, vegetation and a saturated zone (SZ) in achieving co-optimised nitrogen and phosphorus removal in biofilters. ...


    By IWA Publishing

  • HS-200 Used in natural gas production

    A unique and proven wastewater treatment system is being used at several natural gas compressor stations. Oil leakage and spills when servicing compressors together with maintenance wash-down water, are being satisfactorily treated with oil removal systems. The systems usually consist of a wastewater holding tank with an oil drain off valve, a coalescing oil/water separator ...


    By Hydrosil International

  • Introducting a New Media for Fixed-Film Treatment in Decentralized Wastewater Systems

    ABSTRACTBoth naturally occurring and artificial media have been used to treat wastewater in small community settings. Systems using naturally occurring media include sand filters and peatbased biofilters. Artificial media include open cell foam, textiles, and plastics. All the above operate as fixed-film systems, in that attached growth microorganisms are encouraged to colonize and reproduce in ...

  • Green Sand Filters, Chile

    INTRODUCTION In August 2013, Pure Aqua, Inc. manufactured and supplied Green Sand Filters to a major company in Chile to lower the manganese and iron level in well water. The system came complete with tank, top mounted valves, and high quality green sand media. The system was designed to produce 24 GPM. Since the initial startup, ...


    By Pure Aqua, Inc.

  • Micro Media Filtration Proving Effective in Produced Water Softening Systems

    Having an eff ective, durable pretreatment system in advance of ion exchange produced-water softening systems is the fi rst, most critical line of defense – ensuring smooth, more troublefree performance downstream. It’s especially true when dealing with today’s ion exchange technologies, which require TSS (total suspended solids) of 0.1-0.5 mg/L and turbidities of 0.1-1 NTU ...


    By Eco-Tec Inc.

  • Biological trickling filters - New Zealand

    The Client VWS UK is involved in a unique project in New Zealand for a new Wastewater treatment plant in Hastings. The Client's Needs In New Zealand the Maori people have a strong influence over any decision affecting the land. Maori are deeply offended by discharge of human wastes, particularly to natural waters and also land.Historically, in Maori ...


  • Bio-augmentation of fixed film filters

    Once regarded as the main process option for the waste water treatment for small communities, circular biological filters, so common on the outskirts of towns for many years, provided a reliable low cost and low profile method of treating household waste water. Quiet and robust, their simple engineering and structural design could be easily maintained by a daily visit from an operator, who, on ...


    By Greener Waste Technology

  • World’s largest compressible media filtration plant eliminates combined sewer overflows, with potential for dry-weather use

    The City of Springfield, Ohio, recently opened its 100 MGD enhanced high-rate treatment facility, designed to treat and disinfect combined high-volume stormwater and wastewater flows generated by wet-weather conditions. Utilizing EPA-documented Compressible Media Filtration technology – FlexFilter™ from WesTech – the system can also provide tertiary filtration and disinfection ...


    By WesTech Engineering, Inc.

  • Particle removal efficiency of Nano alumina fiber filters

    A 2 nanometer alumina fiber is combined with a microglass fiber to produce a nonwoven filter. Its pore size is 2 microns, yet it is functionally rated at 0.03 microns. Data are presented showing dirt holding capacity and filtration efficiency for particles from 0.001 to 7 microns. The filters have high retention for micron size silica dust, bacteria, virus, DNA/RNA, tannin and latex spheres. ...


    By Argonide Corporation

  • Use of bauxite for enhanced removal of bacteria in slow sand filters

    Slow sand filtration (SSF) is a well-known process for drinking water treatment and is widely used for the production of biologically stable drinking water and particle removal. The removal process of particles and microorganisms is highly dependent on the buildup of the schmutzdecke at the filter surface. During the ripening period and especially for cold waters, the buildup of the ...


    By IWA Publishing

  • Minimising Risks to Air Quality and Regulatory Compliance With Total Filter Management

    It has been shown in recent studies that as much as 25% of the total site operating budget (excluding raw material costs) for a typical medium-large dosage-form manufacturing facility will be spent on compliance measures for internal quality systems and external regulatory activities. (1) Market realities indicate that the pharmaceutical companies will need to address the overall cost of ...


    By GVS Filter Technology

  • Phosphorus sorption capacity of filter materials used for on-site wastewater treatment determined in batch experiments–a comparative study

    Received for publication April 25, 2008. Increasing numbers of filter materials have been proposed as suitable media for P removal in on-site wastewater treatment systems. The phosphorus sorption capacity (PSC) of the material can be estimated in batch experiments and is commonly used as the criterion for material selection. However, there is no standard procedure and batch experimental ...

  • Bio-enhanced activated carbon filter with immobilized microorganisms for removing organic pollutants in the Songhua River

    Five dominant microorganisms including four kinds of Pseudomonas and one kind of Bacillus were isolated from the Songhua River. The organic pollutants removal potential and community composition of these five dominant microorganisms immobilized on activated carbon filter, which is called the bio-enhanced activated carbon filter (BEAC), were investigated to compare with the ...


    By IWA Publishing

  • BioLargo`s AOS Filter Wins `Technology Star Award` - New Technology Magazine -The First Word on Oil Patch Innovation

    Advanced disinfectant technology developer sets sights on oil and gas applications A small publicly-listed Santa Ana, Calif.–based company that is developing water purification and advanced disinfectant technologies, all using some form of iodine, sees one of its Edmonton-developed technologies as a way to clean up and even eliminate oilsands mining tailings ...


    By Biolargo, Inc.

  • Filtration and manganese removal

    Manganese removal through a filter bed is generally carried out and accepted by practitioners and researchers as occurring through catalytic oxidation at the surface of MnO2 coated media, although manganese passage through a coated media filter has been little investigated. To better understand the kinetics of Mn removal through a naturally coated filter, a pilot plant consisting of four filter ...


    By IWA Publishing

  • Cause of rapid monochloramine decay observed in treated water

    Rapid monochloramine decay has been observed in the product water of three River Murray water treatment plants (WTPs). Previous investigations identified that rapid monochloramine decay was microbiological in nature and observed in samples taken after media filtration but was absent in filtered water samples from a fourth WTP of similar design. The filters at the WTP not exhibiting rapid decay ...


    By IWA Publishing

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